Interview Questions.

Q1. What Tools Do You Use To Wardrive?

Depending on the operating machine in use, Kismet for Linux or Kismac for OS X offer the greatest level of capability for detecting and figuring out WLANs. NetStumbler is available for Windows but supports best energetic WLAN detection and identity, whereas the Linux and OS X gear both support passive WLAN detection and identity.

Q2. What Is Wep?

Wired Equivalent Privacy is a safety protocol described by the IEEE Wireless Fidelity (WiFi) 802.11b widespread designed to provide a similar degree of protection and privacy for a WLAN (wireless nearby region network) as generally anticipated from a stressed LAN (nearby place community).

Wired LANs however, are physically covered due to the fact they're inner cozy buildings in contrast to wi-fi networks that send statistics over radio waves not restricted by bodily obstacles like partitions and floors. WEP encrypts facts despatched over radio waves in order that it's far blanketed as it is transmitted from one quit point to some other.

Q3. What Is The Wi-fi Alliance?

The Wi-Fi Alliance is a worldwide enterprise affiliation that governs the standards round WiFi interoperability and protection. 

Q4. What Is Radius ?

Already in location in many organizations, faraway get right of entry to dial-up service (RADIUS), is another fashionable that protects access to wi-fi networks. RADIUS employs a user call and password scheme to allow most effective authorised customers get admission to to the network – it does not have an effect on or encrypt statistics. When a consumer needs get entry to to community documents, electronic mail programs or the internet, they post their person call and password to the server, the server verifies that the person has an account, then verifies that the user is the usage of the perfect password, before granting get admission to.

Q5. What Is An Ssid ?

Every wireless community, whether or not domestic or commercial enterprise, has a call such as up to 32 letters or numbers by means of which it can be identified – that is its Service Set Identifier (SSID). A wi-fi access point (AP) or router in open network mode will periodically broadcast a beacon sign along side the signal energy and purposeful abilties of the AP, and the SSID to all wireless devices within range saying that the community is live.

Q6. What Is Wpa2?

Wi-Fi Protected Access 2 is an better version of WPA. It is the reliable 802.11i standard that turned into ratified by the IEEE in June two hundred@WPA2 is stronger than WPA as it uses Advanced Encryption Standard (AES) instead of RC-4/TKIP (see above). AES helps 128-bit, 192-bit and 256-bit keys. WPA2 also can use pre-shared keys or 802.1x authentication.

Q7. What Is Kerberos?

Kerberos is a network authentication system primarily based on key distribution, developed by means of MIT.

Devices communicating over a stressed or wireless network discover themselves to each different while stopping eavesdropping or replay assaults. After a consumer and server have recognized themselves to each other, Kerberos enables their verbal exchange to be encrypted to guarantee privacy and data integrity, the usage of cryptography structures inclusive of statistics encryption popular (DES).

Q8. What Is Passpoint?

Passpoint is a application launched by using the Wi-Fi Alliance so that you can streamline network get entry to in hotspots and get rid of the want for customers to find and authenticate a network on every occasion they connect. The first launch of Passpoint became in 2012 and the second release become in October 2014.

Q9. How Secure Is Wep?

WEP has been observed to have some of weaknesses. At its base, the encryption set of rules is defective, making it vulnerable to cracking. Also, the keys used for safety are unreliable and easily deciphered.

Q10. What Is Ma C Filtering And How Effective Is It?

Every Wi-Fi device has its very own precise media access manage (MAC) number. Networks can be configured to just accept only sure MAC addresses and filter out the relaxation. MAC filtering is powerful for small networks, however for large networks it isn't always as useful as skilled hackers can imitate a MAC address through intercepting it after which programming their personal laptop to broadcast the usage of this stolen MAC deal with.

Q11. Who Determines The Wireless Standards?

The IEEE develops and determines the wireless standards (802.11a, b, g, and so on). The WiFi Alliance, the organization that owns the WiFi trademark, then certifies the interoperability of these gadgets.

Q12. What Security Should I Use? Wep; Wpa Or Wpa2?

You must use WPA2 as it is the maximum comfy of all 3 options and uses AES encryption to guard information. After WPA2, WPA is the second most relaxed the usage of Temporal Key Integrity Protocol (TKIP) to comfortable transmission. WEP is the least comfy due to its incorrect encryption set of rules.

Q13. What Information Do I Need To Provide To Get A Securewifi Certificate?

To order a SecureWiFi Certificate you need the not unusual call for the certificate, a emblem and/or pleasant name in your carrier issuer, enterprise information (name, address), and speak to information (call, telephone, electronic mail). Once you complete the order, DigiCert’s validation group will touch you to gather validation statistics.

Q14. What Is The Difference Between Active And Passive Wlan Detection?

Active WLAN detection requires that the SSID be broadcast in the beacon body. Passive WLAN detection listens to all traffic in variety of the tool and determines what WLANs are in range.

Q15. What Is Encryption And Why Is It Important?

Encryption is a protection degree that makes use of unique technology to scramble transmissions from one quit to the alternative. One of the most popular types of encryption uses unique keys or codes enabling two computers to speak: the sending pc transmits a key or code to the receiving laptop and if the keys fit, the sender is allowed into the gadget.

Encryption is vital because it prevents others from analyzing your messages, files and statistics.

Q16. Can I Use Another Type Of Certificate To Secure My Osu Server?

WiFi certificates are capable of authenticate a carrier provider because of the unique WiFi root on Passpoint-licensed devices. WiFi certificate are the simplest sort of certificates which can provide this authentication and the visible signs just like the logo and pleasant name.

Q17. What Features Are Included In Passpoint Release 2?

The first release of Passpoint protected capabilities round community choice and at ease access. In the second one launch of Passpoint, the Wi-Fi Alliance introduced new, streamlined techniques for secure online signup and policy provisioning. DigiCert SecureWiFi Certificates assist to secure the web signup process.

Q18. What Other Products Does Digicert Offer?

As a publicly depended on Certificate Authority, DigiCert gives a complete line of authentication and encryption solutions.

Q19. What Is The Primary Difference Between 802.11g And 802.11a?

802.11g operates inside the 2.Four GHz frequency variety, as do 802.11b and 802.11i, while 802.11a operates in the 5 GHz frequency variety.

Q20. Briefly Describe The Process Involved In Cracking Wep?

To efficaciously crack a WEP key, you first need to acquire an Address Resolution Protocol (ARP) packet from the get admission to point you need to attack. You can obtain this packet the use of a device which includes Void11 to ship deauthentication packets to the customers related to that get right of entry to factor. When the customers reassociate to the get admission to factor, ARP packets can be generated and may be captured. After you've got captured a valid ARP packet, you can use a tool inclusive of Aireplay, a part of the Aircrack suite, to inject the ARP packet back into the community. This injection technique will cause a huge wide variety of initialization vectors to be generated. You can seize this site visitors with any pcap format sniffer. Ethereal, Airodump, and Kismet all aid pcap format. After you have captured among 500,000 and 1 million particular initialization vectors, you may then crack the WEP key using Aircrack or other, comparable equipment. Most of those tools are available without cost at the Internet.

Q21. Do Wifi Certificates Replace Wireless Security Protocols Like Wpa2?

No. WiFi certificate are handiest used to encrypt records all through the signup technique. They aren't used to encrypt information that is passed while an give up-person is surfing the Internet.

Q22. I Have Heard That Disabling The Ssid Beaconing Functionality Can Stop War Drivers From Acc Essing My Wlan . Is This True?

This allows make your wi-fi community less prone, however it’s still now not failsafe. When you disable the beacon capability, you need to understand the SSID to get right of entry to the relationship. If you are not broadcasting, the hacker does not effortlessly recognize the SSID to your network, however he can nonetheless intercept information packets as they tour between your access factor and wireless customer, vice versa. This facts may display the SSID of your network.

Q23. What Are The Logo And Friendly Name?

When you order a SecureWiFi Certificate, you ought to consist of both a logo, friendly name, or both a logo and a friendly name. The brand and pleasant name are proven to quit-users after the WiFi certificates on the OSU server is proven by means of the tool to expose that the provider provider has been authenticated.

Q24. What Is The Minimum Passphrase Length That Should Be Used For Wpa-psk?

Because WPA-PSK with a short passphrase is prone to a dictionary attack, and automated equipment are to be had to facilitate this process, a WPA-PSK passphrase have to be as a minimum 21 characters lengthy.

Q25. What Are 802.11i And 802.1x?

These are new security requirements advanced by using 802.Eleven that use superior encryption technology together with Advanced Encryption Standard (AES) and Temporal Key Integrity Protocol (TKIP), in addition to cozy key-distribution methods. 802.1x enables automatic converting of encryption keys at positive time durations, for instance every five minutes or so.

By the time a hacker has intercepted a key and controlled to decipher it, a new key has already changed it.

Q26. How Many Types Of Extensible Authentication Protocols (eaps) Are Supported By Wpa/wpa2 And What Are They?

There are six absolutely supported EAP types for WPA/WPA2: EAP-TLS; EAP-TLS/MSCHAPv2;

PEAPv0/EAP-MSCHAPv2; PEAPv1/EAP-GTC; EAP-SIM;and EAP-LEAP.

Q27. What Is Wpa?

Wi-Fi Protected Access (WPA) is a facts encryption specification for 802.Eleven wi-fi networks that replaces the weaker WEP. Created via WiFi Alliance earlier than the 802.11i security fashionable turned into ratified with the aid of the IEEE, it improves on WEP by way of using dynamic keys, Extensible Authentication Protocol to comfortable community get right of entry to, and an encryption method called Temporal Key Integrity Protocol (TKIP) to relaxed facts transmissions.

Q28. Should I Use Wep?

It is higher than no security in any respect, however it isn't recommended.

Q29. What Is The Difference Between The Hostap Drivers And The Wlan-ng Drivers For Linux?

Both of these drivers work with a selection of cards; however, most effective the HostAP drivers will let you region your card in screen mode.